This product is a cylindrical shape. Product head is spherical, very smooth, will not scratch the surface in contact with it. Pr The shaft length is 65MM, the diameter is 8MM, is 9MM wide groove is used to hold the pulley, the other end has two outwardly open loop, is limited. The company can according to the requirements of the guests to do a similar limit pin.MaterialEasy to iron Length 65MM ...